Audi A8 D3 3.0 TDI Intake cleaning. Prevent EGR issues and recover escaped horses :-)

Horrible carbon buildup in the intake. EGR reported 'insufficient flow' : ---------------------------------------------------------------------------------------- 001025 - EGR System P0401 - 002 - Insufficient Flow Freeze Frame: Fault Status: 01110010 Fault Priority: 0 Fault Frequency: 7 Reset counter: 255 Mileage: 250750 km Time Indication: 0 Date: 2021.09.15 Time: 11:25:16 Freeze Frame: RPM: 1554 /min Torque: 128.7 Nm Speed: 21.3 km/h Duty Cycle: 68.7 % Duty Cycle: 20.9 % Mass Air / Rev.: 499.4 mg/str Duty Cycle: 38.7 % ----------------------------------------------------------------------------------------